CN111527390A - Method for demonstrating cleaning efficacy - Google Patents

Method for demonstrating cleaning efficacy Download PDF

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Publication number
CN111527390A
CN111527390A CN201880084879.9A CN201880084879A CN111527390A CN 111527390 A CN111527390 A CN 111527390A CN 201880084879 A CN201880084879 A CN 201880084879A CN 111527390 A CN111527390 A CN 111527390A
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porous article
gas
iii
treating
component
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CN111527390B (en
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S·P·马奎尔
J·S·阿琳卡斯特
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Unilever IP Holdings BV
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Unilever NV
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/2813—Producing thin layers of samples on a substrate, e.g. smearing, spinning-on
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/2813—Producing thin layers of samples on a substrate, e.g. smearing, spinning-on
    • G01N2001/282—Producing thin layers of samples on a substrate, e.g. smearing, spinning-on with mapping; Identification of areas; Spatial correlated pattern
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G01N2013/0241—Investigating surface tension of liquids bubble, pendant drop, sessile drop methods
    • G01N2013/0266—Bubble methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G01N2013/0275—Investigating surface tension of liquids involving surface-active agents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N2015/0846—Investigating permeability, pore-volume, or surface area of porous materials by use of radiation, e.g. transmitted or reflected light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/0245—Gases in porous solids

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fluid Mechanics (AREA)
  • Dispersion Chemistry (AREA)
  • Cosmetics (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

Disclosed is a method for demonstrating cleaning efficacy of a personal care product or component thereof, the method comprising: (i) selecting a porous article capable of allowing a gas to pass through a first portion of its pores, wherein the porous article is connected to a source of the gas and immersed in a liquid, the gas flowing out of the pores to generate bubbles when the source releases the gas; (ii) treating the first portion of the porous article with a contaminant; (iii) treating the porous article of the first portion with the personal care product or a component thereof; wherein a second portion of the porous article is selected in step (i); (iii) also treating the second portion with a contaminant in step (ii); and treating the second portion with a comparison product or a blank control product in step (iii); and wherein after step (iii) the method comprises a step (iv) of assessing the change in the treated first portion relative to the untreated article and/or relative to the treated second portion, said change being the amount of gas bubbles released from the porous article.

Description

Method for demonstrating cleaning efficacy
Technical Field
The present invention relates to a method for demonstrating the cleaning efficacy of a personal care product or component thereof. In particular, the method includes selecting a porous article capable of allowing gas to pass through a first portion of its pores, treating the article of the first portion with a contaminant, then treating the article of the first portion with the personal care product or a component thereof, and observing gas bubbles released from the article of the first portion.
Background
Personal care products have been designed to improve the condition of the skin or hair. For example, hair care compositions comprising one or more cleansing surfactants are known in the art for providing cleansing benefits to the hair and/or scalp. Unfortunately, however, the benefits of such products may not be immediately perceived by the user, and in fact, may require repeated applications for many hours or even days to produce a benefit perceptible to the user.
In vivo and in vitro instrumental measurements of the cleanliness of skin (including scalp) or hair are often cumbersome and/or involve expensive laboratory equipment. Moreover, such measurements often yield numerical parameters that are difficult for a layperson to understand or at least relate to the expected product efficacy.
EP 1302241 a2 discloses a method for evaluating a liquid as a fabric care composition or as a component thereof, the method comprising providing a test fabric sheet comprising a plurality of test areas while contacting the test areas with a liquid.
WO 94/11721 discloses an ultrasonic inspection device for detecting defects in a filter. The device operates on a wet filter and includes a housing. The wet filter divides the housing into an inlet side and an outlet side. Both the inlet side and the outlet side may be filled with gas, e.g. using a standard forward flow test setup. The microphone is positioned adjacent the wet filter. The loudspeaker receives an acoustic signal generated within the chamber (any combination of inlet side, outlet side, inlet tube or outlet tube) as a result of increased pressure on the inlet side. Also included is a signal processing device for analyzing the acoustic signal received by the microphone for determining whether the filter is defective. The invention includes various methods for determining whether a filter is defective. A method may include the steps of: the wet filter was placed in a test enclosure to divide the test enclosure into an inlet side and an outlet side, the inlet side was pressurized with gas, and both the gas flow and the volume on the outlet side were measured, thereby determining whether the filter was defective.
Stan Hauter et al, "how to clean and reuevenate old air stores for reuevenating acquerium airstone", XP055500437 discloses a method of cleaning and rejuvenating the air stones (airstones) to restore their effectiveness.
The present inventors have therefore determined that there is a need to provide a method that can demonstrate the cleaning efficacy of a personal care product, but does not require specialized equipment and/or is easily correlated with user benefits.
Disclosure of Invention
In a first aspect, the present invention relates to a method for demonstrating cleaning efficacy of a personal care product or a component thereof, the method comprising:
(i) selecting a porous article capable of allowing a gas to pass through a first portion of its pores, wherein the porous article is connected to a source of the gas and immersed in a liquid, the gas flowing out of the pores to generate bubbles when the source releases the gas;
(ii) treating the first portion of the porous article with a contaminant;
(iii) treating the porous article of the first portion with the personal care product or a component thereof;
wherein a second portion of the porous article is selected in step (i); (iii) also treating the second portion with a contaminant in step (ii); and treating the second portion with a comparison product or a blank control product in step (iii); and
wherein after step (iii) the method comprises a step (iv) of assessing the change in the treated first portion relative to the untreated article and/or relative to the treated second portion, said change being the amount of gas bubbles released from the porous article.
All other aspects of the invention will become more readily apparent when considering the following detailed description and examples.
Detailed Description
Unless in the examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical characteristics of materials and/or use are to be understood as modified by the word "about".
All amounts are by weight of the final oral care composition, unless otherwise indicated.
It should be noted that when any numerical range is specified, any particular upper limit value can be associated with any particular lower limit value.
For the avoidance of doubt, the word "comprising" is intended to mean "including", but not necessarily "consisting of or" consisting of. In other words, the listed steps or options need not be exhaustive.
The disclosure of the invention as found herein is to be considered to cover all embodiments as found in the claims as being multiply dependent upon each other, irrespective of whether the claims may be found without such multiple dependencies or redundancies.
The method of the invention comprises a step (i) of selecting a porous article capable of allowing a gas to pass through a first portion of its pores, wherein said porous article is connected to a source of said gas and immersed in a liquid, the gas flowing out of said pores to generate bubbles when said source releases said gas. Porous article as used herein refers to any article having pores on its surface and/or in voids in the body capable of allowing gas to pass through. Preferably, the porous article is a solid. Solid as used herein refers to a state at ambient environment (25 ℃ and atmospheric pressure).
The porous article is capable of allowing gas to pass through its pores. Gas as used herein refers to a state under ambient conditions (25 ℃ and atmospheric pressure). The gas may be a pure gas or a gas mixture containing a variety of pure gases, such as air. Preferably, the gas is air.
Typically, the porous article is a diffuser for the gas bubbles, more preferably a bubbler, most preferably an air stone. Porous articles are typically made from hardwood (including basswood (basswood), silver birch (silver birch), oak (oak) or basswood (limewood)) with fine, straight, porous textures, ceramics, minerals, plastics, natural porous stones such as pumice, or glass beads incorporated into small cylinders designed to release bubbles of various sizes.
The porous article is immersed in a liquid, preferably contained in a container such as a fish tank or a dedicated structure such as a beaker. Preferably, the liquid is aqueous, including water or an aqueous solution, preferably water. Deionized water is preferably used. Water containing mineral cations may also be used. The liquid preferably comprises more than 1.5%, more preferably more than 5%, more preferably also more than 10% and most preferably from 20 to 100% water by weight of the liquid.
The porous article is connected to a source of gas by a length of tubing that releases gas through the tubing and out of the pores of the porous article to create gas bubbles. Preferably, the source of gas is a gas pump.
The porous article according to the invention may have different sizes and shapes. The article may have the form of a cylinder, sphere, disk, sheet, cube or irregular shape. The porous article of the first part should not be too small. In particular, the first portion should be visible to the naked eye. The diameter of the porous article of the first part is preferably from 0.5mm to 1m, more preferably from 1mm to 60cm, still more preferably from 5mm to 30cm, most preferably from 1cm to 10cm, including all ranges subsumed therein. Diameter as used herein refers to the largest measurable distance or major dimension of the porous article of the first portion.
To generate fine bubbles, the porous article preferably has a pore size of 10nm to 2mm, more preferably 100nm to 500 microns, still more preferably 500nm to 200 microns, most preferably 1 micron to 100 microns, including all ranges subsumed therein. Pore size refers to the maximum measurable distance of a pore without producing a well-defined sphere. The pore size can be measured, for example, by Scanning Electron Microscopy (SEM).
The process of the present invention comprises a step (ii) of treating the first portion of the porous article with a contaminant.
Contaminant as used herein refers to dirt, grease or components thereof. In particular, those that are capable of depositing on hair or skin and/or clogging skin pores. Illustrative, but non-limiting, examples of the types of contaminants that may be used in the present invention include, for example:
wax, which is a high melting point oil having a melting point above 45 ℃, preferably above 55 ℃. Preferred waxes include fatty alcohols and fatty acids which are solid at room temperature, particularly preferably paraffins, triglycerides or mixtures thereof. Most preferred are microcrystalline waxes and beeswax;
clays as used herein include combinations of one or more clay minerals with trace amounts of metal oxides and organic substances, such as, for example, primary kaolin (primary kaolin), bentonite, kaolin, hectorite (laponite), hectorite. The clay may be hydrophobically modified, such as stearyl dimethylbenzyl ammonium (stearylalkonium) hectorite, quaternary ammonium salt-18 bentonite, quaternary ammonium salt-18 hectorite, distearyldiammonium (disteardimonium) hectorite, derivatives thereof, or mixtures thereof;
natural oils, preferably include triglycerides of unsaturated carboxylic acids containing 1,2 or 3 ethylenic bonds. Preferably, the unsaturated carboxylic acid containing 1,2 or 3 ethylenic bonds as part of a triglyceride contains 14 to 22 carbon atoms. More preferably, the triglyceride is a triglyceride of an unsaturated carboxylic acid containing 16 to 20 carbon atoms. Most preferably, the triglyceride is a triglyceride of an unsaturated carboxylic acid containing 18 carbon atoms. Preferably, the natural oil comprises sunflower oil; or
Other ingredients may be included to deposit on hair or skin and/or to be trapped in skin pores.
Preferably, the contaminant is in the form of a styling product, such as a hair styling wax.
The treating step (ii) comprises contacting at least the first portion with a contaminant. Contacting may, for example, comprise spreading the contaminant over at least one surface of the first portion. Preferably, the treatment step (ii) comprises the steps of: (a) removing a first portion from the liquid; (b) treating the first portion with a contaminant; (c) replacing the first portion into the liquid.
The duration of the treatment step (ii) is the time between the start of the application of the contaminant to the article and the start of step (iii), preferably between 1s and 24 hours. However, the method may be particularly applicable in situations where it is desirable to quickly demonstrate the efficacy of a product, such as, for example, in a store and/or at the point of sale. Thus, it is preferred that the duration of the treatment step is from 1s to 2 hours, more preferably from 5s to 1 hour, still more preferably from 10s to 10 minutes, and most preferably from 30s to 5 minutes.
The process of the present invention comprises a step (iii) of treating the first portion of the porous article with a personal care product or a component thereof. The personal care product is preferably a personal care product intended to be applied to hair and/or skin for the purpose of improving the condition of the hair and/or skin. In particular, the product is preferably intended to improve the condition of the hair and/or skin, selected from: cleansing, barrier function, moisturizing, anti-dandruff, and combinations thereof. Preferably, the product is a hair care product, in particular a hair care product intended to improve the condition of the scalp. In rinse-off or leave-on compositions, preferably in rinse-off compositions such as shampoos, the product is primarily intended for topical application to at least a portion of the scalp and/or hair of an individual. Treatment step (iii) comprises contacting at least the first part with the product or component. Contacting may, for example, comprise spreading the product or component over at least one surface of the first part. Additionally or alternatively, contacting may comprise immersing the first portion in a liquid comprising the product or component. Treatment may also include rinsing the first portion after contacting with the product or component.
Preferably, the treatment step (iii) comprises the steps of: (d) removing the first portion from the liquid; (e) treating the first portion with a personal care product or a component thereof; (f) replacing the first portion into the liquid.
In another embodiment, in step (iii), the first portion is treated with a component of a personal care product. Treating a portion with the component rather than the entire product allows, for example, the component to be applied to the portion at a higher concentration than in the product and/or in a manner different than would be achieved by applying the entire product. Therefore, the cleaning efficacy of the components can be enhanced, so that the efficacy can be exhibited in a short time. Preferably, a first portion of the article is treated with an aqueous liquid comprising the component. More preferably, the concentration of the component by weight of the aqueous liquid is greater than the concentration of the component by weight of the personal care product. For example, the concentration of the component by weight of the aqueous liquid may be at least two times, more preferably at least three times, still more preferably at least five times and most preferably at least ten times the concentration of the component by weight of the personal care product.
The components should be related to the product in some way. By "associated with" it is meant that the method preferably includes the step of identifying the component as an ingredient of the product. For example, prior to step (i), the method may comprise the step of selecting a component of the personal care product for evaluation. Additionally or alternatively, the method may include the step of communicating that the component is an ingredient of the personal care product by indicia, such as text, video, audio, and the like.
The components should be selected to be components that provide cleansing, barrier function, moisturization, anti-dandruff, and combinations thereof. For example, the component is preferably or at least comprises a surfactant, a polyol, a fatty substance (such as an oil, a fatty alcohol, a fatty acid and/or a soap), a silicone oil, an anti-dandruff agent or a mixture thereof. Most preferably, the component comprises a surfactant.
Preferred surfactants include or are cleansing surfactants. Preferably, the cleansing surfactant is an anionic surfactant. Examples of suitable anionic cleansing surfactants are alkyl sulphates, alkyl ether sulphates, alkaryl sulphonates, alkanoyl isethionates, alkyl succinates, alkyl sulphosuccinates, alkyl ether sulphosuccinates, N-alkyl sarcosinates, alkyl phosphates, alkyl ether phosphates and alkyl ether carboxylic acids and salts thereof, especially their sodium, magnesium, ammonium and mono-, di-and triethanolamine salts. The alkyl and acyl groups generally contain from 8 to 18, preferably from 10 to 16, carbon atoms and may be unsaturated. The alkyl ether sulfates, alkyl ether sulfosuccinates, alkyl ether phosphates and alkyl ether carboxylic acids and salts thereof may contain from 1 to 20 ethylene oxide or propylene oxide units per molecule.
Typical anionic cleansing surfactants for use in the present invention include sodium oleoyl succinate, ammonium lauryl sulphosuccinate, sodium lauryl sulphate, sodium lauryl ether sulphosuccinate, ammonium lauryl sulphate, ammonium lauryl ether sulphate, sodium dodecylbenzene sulphonate, triethanolamine dodecylbenzene sulphonate, sodium cocoyl isethionate, sodium lauryl isethionate, lauryl ether carboxylic acid and sodium N-lauryl sarcosinate. Preferred anionic surfactants are alkyl sulfates and alkyl ether sulfates. These materials have the corresponding formula R2OSO3M and R1O(C2H4O)xSO3M, wherein R2Is an alkyl or alkenyl group of 8 to 18 carbon atoms, x is an integer having a value of about 1 to about 10, and M is a cation such as ammonium, an alkanolamine such as triethanolamine, a monovalent metal such as sodium and potassium, and a polyvalent metal cation such as magnesium and calcium. Most preferably, R2Having 12 to 14 carbon atoms, is straight-chain rather than branched. Preferred anionic cleansing surfactants are selected from sodium lauryl sulfate and sodium lauryl ether sulfate (n) EO (where n is 1 to 3), more preferably sodium lauryl ether sulfate (n) EO (where n is 1 to 3).
The component may also include co-surfactants such as amphoteric and zwitterionic surfactants. Illustrative, but non-limiting, examples include alkyl amine oxides, alkyl betaines, alkyl amidopropyl betaines, alkyl sulfobetaines, alkyl glycinates, alkyl carboxyglycinates, alkyl amphoacetates, alkyl amphopropionates, alkyl amphoglycinates, alkyl amidopropyl hydroxysultaines, acyl taurates, and acyl glutamates, wherein the alkyl and acyl groups have from 8 to 19 carbon atoms. Typical amphoteric and zwitterionic surfactants useful in the present invention include lauryl amine oxide, coco dimethyl sulfopropyl betaine, lauryl betaine, cocamidopropyl betaine, cocamide MEA, and sodium cocoamphoacetate. Preferably, the co-surfactant is cocamidopropyl betaine.
In a particularly preferred embodiment, the component comprises sodium lauryl ether sulfate, cocamidopropyl betaine, or a combination thereof, preferably a combination of sodium lauryl ether sulfate and cocamidopropyl betaine.
Preferred polyols include polyalkylene glycols, more preferably alkylene polyols and their derivatives, including propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol and derivatives thereof, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1, 3-butylene glycol, isoprene glycol, 1,2, 6-hexanetriol, glycerol, ethoxylated glycerol, propoxylated glycerol and mixtures thereof. Most preferred is glycerol (also known as glycerin).
Silicone oils can be divided into volatile and non-volatile classes. The term "volatile" as used herein refers to those materials that have a measurable vapor pressure at ambient temperature (25 ℃). The volatile silicone oil is preferably chosen from cyclic (cyclomethicones) or linear polydimethylsiloxanes containing from 3 to 9, preferably from 4 to 5, silicon atoms.
Non-volatile silicone oils useful as emollient materials include polyalkylsiloxanes, polyalkylarylsiloxanes, and polyether siloxane copolymers the substantially non-volatile polyalkylsiloxanes useful herein include, for example, those having a viscosity of about 5 × 10 at 25 deg.C-6To 0.1m2Polydimethylsiloxane per second. In thatAmong the preferred non-volatile emollients useful in the present compositions are those having a viscosity of about 1 × 10 at 25℃-sTo about 4 × 10-4m2Polydimethylsiloxane per second.
Organopolysiloxane crosslinked polymers can be usefully employed. Representative of these materials are dimethicone/vinyl dimethicone crosspolymer and dimethicone crosspolymer, which are available from a variety of suppliers including Dow Corning (9040,9041,9045,9506 and 9509), General Electric (SFE 839), shinEtsu (KSG-15, 16 and 18[ dimethicone/phenyl vinyl dimethicone crosspolymer ]), and Grant industries (Gransil brand materials), and lauryl dimethicone/vinyl dimethicone crosspolymer supplied by Shin Etsu (e.g., KSG-31, KSG-32, KSG-41, KSG-42, KSG-43 and KSG-44).
Specific examples of fatty materials include stearyl alcohol, glyceryl monoricinoleate, mink oil, cetyl alcohol, isopropyl isostearate, stearic acid, isobutyl palmitate, isocetyl stearate, oleyl alcohol, isopropyl laurate, hexyl laurate, decyl oleate, octadecan-2-ol, isocetyl alcohol, eicosanyl alcohol, behenyl alcohol, cetyl palmitate, di-n-butyl sebacate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, butyl stearate, polyethylene glycol, triethylene glycol, lanolin, cocoa butter (cocoa butter), corn oil, cottonseed oil, olive oil, palm kernel oil, rapeseed oil, safflower seed oil, evening primrose oil, soybean oil, sunflower seed oil, avocado oil, sesame oil, coconut oil, peanut oil, castor oil, acetylated lanolin alcohols, petrolatum, mineral oil, butyl myristate, isostearic acid, isopropyl stearate, stearic acid, isobutyl palmitate, isopropyl laurate, isopropyl, Palmitic acid, isopropyl linoleate, lauryl lactate, myristyl lactate, decyl oleate, myristyl myristate, and mixtures thereof.
Suitable anti-dandruff agents include compounds selected from the group consisting of: azolyl antifungal agents, piroctone olamine, metal pyrithione salts, selenium sulfide or mixtures thereof, preferably azolyl antifungal agents, metal pyrithione salts, piroctone olamine or mixtures thereof. Preferred azole-based antifungal agents are ketoconazole and climbazole. Preferred metal pyrithione salts are zinc pyrithione, copper pyrithione, silver pyrithione, and zirconium pyrithione. Most preferably, the anti-dandruff agent comprises zinc pyrithione, climbazole, piroctone olamine or mixtures thereof.
The duration of the treatment step (iii) is preferably between 1s and 24 hours. However, the method may be particularly suitable for situations where it is desirable to quickly demonstrate the efficacy of a product, such as, for example, in a store and/or at the time of sale. Thus, it is preferred that the duration of the treatment step is from 1s to 2 hours, more preferably from 5s to 1 hour, still more preferably from 10s to 10 minutes, and most preferably from 30s to 5 minutes.
After step (iii), the method comprises a step (iv) of evaluating at least one property of the tested first portion. Most preferably, the attribute is evaluated directly via visual observation. Additionally or alternatively, the property is evaluated by taking images and/or video with a magnification of no more than 100 times, preferably less than 10 times.
The methods of the present invention are particularly effective when used to evaluate the cleaning efficacy of a personal care product or component relative to a comparative product or blank. Accordingly, the method comprises selecting a second portion of the article in step (i); (iii) treating the second portion with a contaminant in step (ii); and treating the second portion with a comparison product or a blank control product in step (iii).
The second portion should be substantially identical to the first portion, for example in terms of type of article and length and aperture.
A comparative product or blank product as used herein refers to a product that has no components or has a lower level of components than the personal care product or components to be tested. The comparison product can be any composition different from the personal care product or component to be tested. However, it is preferred that the concentration of the component by weight of the comparative product or blank product does not exceed one-half (1/2), more preferably one-quarter (1/4), and most preferably one-tenth (1/10) of the concentration of the component by weight of the personal care product or component to be tested.
The property evaluated in step (iv) is the change of the treated first fraction with respect to the untreated article and/or with respect to the treated second fraction. The change is the amount of gas bubbles released from the porous article. The amount of bubbles released from the porous article serves as an indicator that provides a visual cue of the cleanliness of the article pores.
In one embodiment, the method includes the steps of capturing an image of the presentation and/or capturing a video of the presentation, and storing and/or transferring the image and/or video. The images and/or video may be stored, for example, on a recordable medium such as a CD, flash drive, or other computer readable memory. The images and/or video may be communicated, for example, for display on one or more visual display units. Suitable visual display units include, for example, monitors, TV screens and/or mobile device screens.
Additionally or alternatively, the method further comprises the step of capturing an image of the presentation and/or taking a video of the presentation and storing it on a recordable medium.
Additionally or alternatively, the present invention relates to a method of displaying images and/or videos on a visual display unit for demonstrating the cleaning efficacy of a personal care product or component thereof, wherein the images and/or videos display the following processes:
(i) selecting a porous article capable of allowing a gas to pass through a first portion of its pores, wherein the porous article is connected to a source of the gas and immersed in a liquid, the gas flowing out of the pores to generate bubbles when the source releases the gas;
(ii) treating the first portion of the porous article with a contaminant;
(iii) treating the porous article of the first portion with a personal care product or a component thereof;
wherein a second portion of the porous article is selected in step (i); (iii) also treating the second portion with a contaminant in step (ii); and treating the second portion with a comparison product or a blank control product in step (iii); and
wherein after step (iii) the method comprises a step (iv) of assessing the change in the treated first portion relative to the untreated article and/or relative to the treated second portion, said change being the amount of gas bubbles released from the porous article.
The following examples are provided to facilitate an understanding of the invention. The examples are not intended to limit the scope of the claims.
Examples
Example 1
This example demonstrates the cleaning efficacy of the shampoo composition. The compositions were prepared according to the formulations detailed in table 1. All ingredients are expressed as weight percent of the total formulation and are expressed as the content of active ingredient.
TABLE 1
Composition (I) Weight percent of
Sodium laureth sulfate 10％～25％
Cocoamidopropyl betaine 0.1％～10％
Carbomer 0.1～1％
Polymer and method of making same 0.1～1％
Zinc pyrithione 0.1～2％
Climbazole 0.1～0.5％
Silicone 0～10％
Water (W) Balance of
Method of producing a composite material
The comparative product is Head claiming to have good cleaning efficacy&
Figure BDA0002561021610000111
A shampoo comprising silicone, zinc pyrithione, zinc carbonate, sodium laureth sulfate, and cocamide MEA.
Two identical air stones are connected by a length of tubing to an air pump that pumps air through the tubing to the exterior of the air stones, creating a bubbling action in the water. The air stones were each treated with 1.5g of hair styling wax, spread evenly, and left to stand for 30 minutes.
The air stones were placed in vials containing a solution of shampoo to water in a weight ratio of 1:15, shaken for one minute, and then rinsed under running water for another minute. Then, the air stone was placed in a beaker filled with water to observe the generation of air bubbles.
Results
It was observed that the air stones treated with the test samples still released a large amount of air bubbles in the water, indicating that the air stones were deeply purified and cleaned. In contrast, the air stones treated with the comparative products released few air bubbles, indicating that the air stones were still covered by the hair styling wax and that the holes were generally blocked.

Claims (13)

1. A method for demonstrating cleaning efficacy of a personal care product or a component thereof, the method comprising:
(i) selecting a porous article capable of allowing a gas to pass through a first portion of its pores, wherein the porous article is connected to a source of the gas and immersed in a liquid, the gas flowing out of the pores to generate bubbles when the source releases the gas;
(ii) treating the first portion of the porous article with a contaminant;
(iii) treating the porous article of the first portion with the personal care product or a component thereof;
wherein a second portion of the porous article is selected in step (i); (iii) also treating the second portion with a contaminant in step (ii); and treating the second portion with a comparison product or a blank control product in step (iii); and
wherein after step (iii) the method comprises a step (iv) of assessing the change in the treated first portion relative to the untreated article and/or relative to the treated second portion, said change being the amount of gas bubbles released from the porous article.
2. The method of claim 1, wherein the porous article is an airstone.
3. A method according to claim 1 or claim 2, wherein in step (i), the gas is air.
4. A method according to any preceding claim, wherein in step (i), the liquid is aqueous, preferably water.
5. The method of any preceding claim, wherein the contaminant comprises dirt, grease, or a component thereof, preferably a wax, clay, natural oil, or a mixture thereof.
6. The method of any preceding claim, wherein in step (iii), the porous article of the first portion is treated with an aqueous liquid comprising a component of the personal care product.
7. The method according to any preceding claims, wherein the components of the personal care product comprise surfactants, polyols, fatty substances, silicone oils, anti-dandruff agents or mixtures thereof, preferably surfactants.
8. The method of claim 7, wherein the surfactant comprises sodium lauryl ether sulfate, cocamidopropyl betaine, or a combination thereof, preferably a combination of sodium lauryl ether sulfate and cocamidopropyl betaine.
9. The method according to any one of the preceding claims, wherein the duration of the treatment step (iii) is between 1s and 2 hours, preferably between 5s and 1 hour.
10. A method according to any preceding claim, wherein the method further comprises the step of capturing images of the presentation and/or taking videos of the presentation and storing and/or transferring the images and/or videos which may be transferred for display on one or more visible display units.
11. The method of any preceding claim, wherein the personal care product is a hair care product, preferably a shampoo.
12. The method of any preceding claim, wherein the method further comprises the step of capturing an image of the presentation and/or taking a video of the presentation and storing it on a recordable medium.
13. A method of displaying images and/or videos on a visual display unit for demonstrating the cleaning efficacy of a personal care product or component thereof, wherein the images and/or videos display the following processes:
(i) selecting a porous article capable of allowing a gas to pass through a first portion of its pores, wherein the porous article is connected to a source of the gas and immersed in a liquid, the gas flowing out of the pores to generate bubbles when the source releases the gas;
(ii) treating the first portion of the porous article with a contaminant;
(iii) treating the porous article of the first portion with the personal care product or a component thereof;
wherein a second portion of the porous article is selected in step (i); (iii) also treating the second portion with a contaminant in step (ii); and treating the second portion with a comparison product or a blank control product in step (iii); and
wherein after step (iii) the method comprises a step (iv) of assessing the change in the treated first portion relative to the untreated article and/or relative to the treated second portion, said change being the amount of gas bubbles released from the porous article.
CN201880084879.9A 2018-01-03 2018-12-10 Method for demonstrating cleaning efficacy Active CN111527390B (en)

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BR112020010395A2 (en) 2020-11-24
WO2019134786A1 (en) 2019-07-11
EP3735576B1 (en) 2021-10-13
MX2020006887A (en) 2020-09-07
US11422082B2 (en) 2022-08-23
BR112020010395B1 (en) 2023-12-12
JP7242672B2 (en) 2023-03-20
US20200408660A1 (en) 2020-12-31
JP2021509950A (en) 2021-04-08
EP3735576A1 (en) 2020-11-11

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